Drying oil-yieldable or oil-containing material.



No. 703,393. vaunted my 1,1902. E. n. susan.

DBYING 0IL YIELDABLE 0R UIL CNTAINING MATERIAL.

(Application led Oct. 9, 1901.)

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k Arron/EVS UNTTED STATES PATENT OFFICE.

EUG INE R. EDSON, OF CLEVELAND, OHIO.

DRYING OIL-YIELDABLE OR OIL-CONTA'INING MATERIAL.

SPECIFICATION forming *part of Letters Patent NO. 703,393, dated July 1, 1902.

Application iiled October 9, 1901. Serial No. 73,096. (No specimens.)

oil; and the process which constitutes the subject-matter of this application more especially comprises, first, the vaporizing of a large percentage, preferably about fifty per cent., of

the oilless moisture contained in or mixed with the oil-yieldable material in any suitable drier and preferably at a temperature of from 150 to 200 Fahrenheit and in vacuo,

and thereby reducing the mass to the consist- Y ency of a sludge, and preferably stirring the mass during the vaporizing or drying period,- and, secondly, adding to the reduced mass oilabsorbing material-such, for instance, as sawdust, ground tobaccostems, and dried marl-preferably in sufficient quantity-as, for instance, from two hundred to three hundred pounds of the oil-absorbing material to one ton of the reduced mass or sludge-to absorb any oilin the mass which is free and not absorbed or carried by the solid particles or portions of the reduced mass, and, thirdly, drying the enlarged mass at a suitable temperattire-as, forinstance, from 150o to 200 Fahrenheit-until the remainder of the oil'less moisture has been vaporized or eliminated.

Oil-yieldable or oilcontaining` material having more oil than the solid particles of the material can absorb or carry cannot be effectually or sufficiently dried at a temperature as low as 300O Fahrenheit, and a temperature as high as or higher than 300O Fahrenheit must be avoided to prevent discoloration of or injury to the oil.

I would here remark that the process hereinbefore briey described is both for the purpose of preparing a fertilizer and also invaluable as a step in the rendering of the oil.

The accompanying drawing is a side elevation, in central vertical section, of apparatus suitable for use in, carrying out the process which constitutes the subject-matter of this application.

Referring to the drawing, a designates an upright receptacle into which the oil-yieldable material, fish-waste, or other oil-containing matter which is to be dried is introduced for treatment. .The receptacle a is preferably closed, being provided at its upper end and at one side with a manhole or chargingaperture c', normally closed by a suitably-applied cover b.

The receptacle a is centrally provided with a vertically-arranged shaft c, which is supported in any approved manner and extends from within the lower portion of the receptacle upwardly and a suitable distance above the receptacle. A bevel-geard is operatively mounted upon the shaft c above the receptacle a and meshes with a bevel-pinion c, With which a suitablysupported and suitablydriven'driving-shaftfis operativelyprovided. The shaft c has any suitable number of laterally-projecting stirring-arms c. A closed heating-jacket g surrounds the receptacle d. A valved pipe 71, for supplying' the heating agent-steam or whatever it may be-to the chamberof thejacket is arranged to discharge into the said chamber and has a normallyclosed valve r. A drain-pipez' extends from the lower end of the beating-jacket g and has a normally-closed valve j. The pipe t' is in open relation with the chamber of the jacket,

and obviously `liquid resulting from condensation ol steam or otherwise forming and accumulating in the said chamber can be readily drained from the jacket through the pipe t' upon opening the valve j.

The receptacle a is provided at its lower end and centrally with a downwardly-discharging outlet-forming pipe or flue Z, which is provided in any approved manner with a normally-closed slide-valve n.

The receptacle ct is provided at its upper end and at one side with a vapor-conducting pipe or flue o, and a suction-creating device r-such, for instance, as a rotary pump or fanis arranged in the line of the said fiue or pipe. The iiue or pipe o has a normallyclosed valve p between the receiving end or inlet of the suction-creating device and the inner or receiving end of: the pipe or iiue.

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In operating the apparatus the cover b is opened and the oil-yieldable material which is to be dried is introduced int-o the receptacle at the aperture a', and the said cover is again closed, when the valve 7a of the pipe h is opened to permit the supply of the heatingagent to the chamber of the heating-jacket and to result in the heating of the receptacle a and its contents. The valve p of the vaporconducting pipe or flue o is opened to permit the vaporized moisture and gases to escape from the material being dried, and the shaft c, and consequently its stirring-arms c', are operated during the drying period to stir or disintegrate the material and to facilitate the elimination of the ,oilless moisture from the material; but the mass undergoing treatment must not be subjected to a temperature as high as 300 Fahrenheit, because a temperature as high as 300 Fahrenheit Would result in the discoloration of or injury to the oil, which is too valuable to be injured or Wasted. The suction-creating device r may be operated during the drying period not only to facilitate the elimination of the moisture and gases from Within the receptacle ct, but to prevent overheating of the mass Within the said receptacle.

The material which is to be dried is treated, as hereinbefore described, at a drying temperature lower than 300 Fahrenheit until a large percentage of oilless moisture in the mass-say about fiftyper cent-has been vaporized or until the mass has been reduced to the consistency of a sludge. When the mass has been thus reduced, a suitable quantity of oil-absorbing material-such, for instance, as sawdust, ground tobacco-stems, and dried marl-is introduced into the receptacle a at the aperture ct upon opening the cover b, whereupon the said aperture is again closed. Enough oil-absorbing material is added to the reduced mass Within the receptacle d to absorb any oil which is free from or not already absorbed by the solid particles or portion of the reduced mass and which the reduced mass could not absorb and carry during the remainder of the drying period. Good results have been obtained by adding from two hundred to three hundred pounds of the oil-absorbing material to one ton of the reduced mass or sludge. When the oilabsorbing material has been added, as hereinbefore described, the stirring-shaft is operated to mix the oil-absorbing material with the aforesaid reduced mass, and the drying of the enlarged mass takes place, and the remaining oilless moisture can be readily eliminated at a temperature loW enough-that is, lower than 300 Fahrenheitto avoid discoloration of or inj ury to the oil, and the stirringshaft and the suction creating device are operated as may be required to facilitate the drying of the enlarged mass.

/Vhat I claim isl. The process of drying an oil-yieldable or oil-containing mass of material consisting in partially drying the material, then adding an oil-absorbing material to the reduced mass, and then drying the enlarged mass, substantially as and for the purpose set forth.

2. An improved process of drying an oilyieldable or oil-containing mass of material, consisting in drying the material at a temperature loW enough to avoid injury to or deterioration of the oil until a large portion of the oilless moisture has been eliminated from the mass, then adding oil-absorbing material to and mixing the same with the reduced mass, and then drying the enlarged mass at a temperature not detrimental to the oil.

3. An improvementin drying a mass of material which contains more oil than the solid particles or portion of the mass can absorb or carry, consisting in adding, to the mass, oilabsorbing material capable of absorbing and carrying free oil not already absorbed, s'ubstantially as and for the purpose set forth.

4. An improved process ot' drying a mass of material which contains more oil than the solid particles or portion of the mass can absorb or carry, consisting in vaporizing a portion of the oilless moisture contained in the mass, then adding oil-absorbing material and mixing the same 'with the reduced mass, and then drying the enlarged mass.

5. The improved process of drying an oilyieldable or oil-containing mass of material herein described, consisting in partially drying the material at a temperature below 300 Fahrenheit, and n vacuo, until enough oilless moisture has been eliminated to reduce the mass 4to the consistency of a sludge, then adding oil-absorbing material to and mixing the saine With the reduced mass, and then drying the enlarged mass at a temperature beloW 300 Fahrenheit, and in vacuo, substantiallyas and for the purpose set forth.

Signed by me at Cleveland, Ohio, this 12th day of September, 1901.

EUGENE R. EDSON.

Witnesses:

C. H. DORER, TELSA SCHWARTZ.

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